Catalytic benzene oxidation by biogenic Pd nanoparticles over 3D-ordered mesoporous CeO2

Guo, Yunlong; Gao, Yijing; Li, Xiang; Zhuang, Guilin; Wang, Kuncan; Zheng, Yi; Sun, Daohua; Huang, Jiale; Li, Qingbiao

doi:10.1016/j.cej.2019.01.012

Cited by 111 publications

(55 citation statements)

References 71 publications

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“…The catalytic activity data of the samples and related catalysts for benzene catalytic combustion are compared in Table S1 . Although the Pd/CeO 2 catalyst synthesized by Guo et al can achieve 90% benzene catalytic combustion at 187 °C, they used a higher content of Pd (2 wt.%) than Pd/CeO 2 -DC [ 34 ]. Therefore, considering the comprehensive cost, Pd/CeO 2 -DC has high application value.…”

Section: Resultsmentioning

confidence: 99%

“…Guo et al successfully prepared a 3D ordered mesoporous CeO 2 catalyst loaded with biogenic Pd nanoparticles for the catalytic combustion of benzene. The experimental results show that the catalyst has good catalytic activity and can achieve 90% catalytic conversion at 187 °C [ 34 ]. Abbasi et al prepared nanostructured Pt/Al 2 O 3 –CeO 2 catalysts for catalytic combustion of VOCs, and they exhibited high catalytic activity [ 35 ].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Particle Size and Crystal Surface of CeO2 on the Catalytic Combustion of Benzene

et al. 2020

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In this study, three kinds of CeO2 were synthesized, and supported PdOx (x = 0,1) catalysts were prepared for benzene catalytic combustion. The samples were characterized by XRD, N2 adsorption/desorption, HRTEM, XPS and H2-TPR. The results show that three kinds of CeO2 with different structures can be formed by different preparation methods. This is mainly reflected in the differences in pore structure, particle size and crystal plane. CeO2-DC obtained from directly calcined Ce(NO3)3·6H2O had the largest pore volume and pore diameter and smallest particle size. CeO2-DC was mainly exposed to the (200) plane. Combined with the results of the ability test, it could be concluded that when Pd2+ and Pd0 exist at the same time, the activity increases with an increase in the proportion of Pd2+. Meanwhile, the structure of CeO2 affects the formation of oxygen vacancies, thereby affecting the adsorption and degradation of benzene. This article reveals that the particle size, crystal planes, oxygen vacancies and proportion of Pd2+ have a great impact on the catalytic combustion of benzene and allow a more comprehensive understanding of the structure–activity relationship, which can guide us to design high-efficiency catalysts targeted to obtain suitable CeO2-based catalysts for the catalytic combustion of benzene.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Particle Size and Crystal Surface of CeO2 on the Catalytic Combustion of Benzene

et al. 2020

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“…Supports used include molecular sieves, pillared clay, TiO 2 , γ-Al 2 O 3 , CeO 2 , etc. [14][15][16][17][18][19][20]. Mobil Composition of Matter (MCM)-22 zeolite with MWW topology which was named by international zeolite association was adopted as a support, and the confinement of the pores can effectively prevent the agglomeration of Pd particles, thereby achieving the effective utilization of noble metal catalysts.…”

Section: Introductionmentioning

confidence: 99%

Y-Modified MCM-22 Supported PdOx Nanocrystal Catalysts for Catalytic Oxidation of Toluene

et al. 2019

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A series of rare earth elements (REEs)-modified and Mobil Composition of Matter (MCM)-22-supported Pd nanocrystal catalysts were synthesized via a high-temperature solution-phase reduction method and tested for toluene complete oxidation. These catalytic materials were systematically characterized by N2 adsorption/desorption, X-ray powder diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), energy-dispersive spectroscopy (EDS), inductively coupled plasma atomic emission spectroscopy (ICP-AES), temperature-programmed surface reaction of toluene (toluene-TPSR) and X-ray photoelectron spectroscopic (XPS) techniques in order to investigate the structure–catalytic property relationship. Moreover, catalysts with an appropriate yttrium content greatly improved the catalytic activity of 0.2%Pd/MCM-22. PdOx (x = 0, 1) nanoparticles, ranging from 3.6 to 6.8 nm, which were well distributed on the surface of MCM-22. Efficient electron transfer from the Pd2+/Pd0 redox cycle facilitated the catalytic oxidation process, and the formation of Pd (or Y) –O–Si bonds improved the high dispersion of the PdOx and Y2O3 particles. Toluene–TPSR experiments suggested that the addition of Y2O3 improved the physical/chemical adsorption of 0.2%Pd/MCM-22, thus increasing the toluene adsorption capacity. Then, 0.2%Pd/7.5%Y/MCM-22 exhibited the highest catalytic performance. In addition, this catalyst maintained 95% conversion with high resistance to water and chlorine poisoning, even after toluene oxidation at 210 °C for 100 h, making it more valuable in practical applications.

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“…Recently, the plant exact is considered to be one of the most efficient methods, since the unique biological molecules (such as sugars, polyphenols and avonoids, plant extracts, especially Cacumen platycladi extracts) can act as reducing, covering and stable agents in the synthesis process. [31][32][33][34] In this work, Ag/ZnO obtained from Cacumen platycladi extract was coated onto oyster shell-derived CaCO 3 , and used for the reduction of 4-NP and as an antibacterial agent. It was found that the as-obtained Ag/ZnO/CaCO 3 exhibited excellent performance for the reduction of 4-NP and as an antibacterial agent, as compared to that of binary Ag/CaCO 3 and ZnO/CaCO 3 .…”

Section: Introductionmentioning

confidence: 99%

“…Recently, the plant exact is considered to be one of the most efficient methods, since the unique biological molecules (such as sugars, polyphenols and flavonoids, plant extracts, especially Cacumen platycladi extracts) can act as reducing, covering and stable agents in the synthesis process. 31–34 …”

Section: Introductionmentioning

confidence: 99%

Dual functional oyster shell-derived Ag/ZnO/CaCO₃ nanocomposites with enhanced catalytic and antibacterial activities for water purification

et al. 2019

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Catalytic benzene oxidation by biogenic Pd nanoparticles over 3D-ordered mesoporous CeO2

Cited by 111 publications

References 71 publications

Effect of Particle Size and Crystal Surface of CeO2 on the Catalytic Combustion of Benzene

Effect of Particle Size and Crystal Surface of CeO2 on the Catalytic Combustion of Benzene

Y-Modified MCM-22 Supported PdOx Nanocrystal Catalysts for Catalytic Oxidation of Toluene

Dual functional oyster shell-derived Ag/ZnO/CaCO₃ nanocomposites with enhanced catalytic and antibacterial activities for water purification

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Catalytic benzene oxidation by biogenic Pd nanoparticles over 3D-ordered mesoporous CeO2

Cited by 111 publications

References 71 publications

Effect of Particle Size and Crystal Surface of CeO2 on the Catalytic Combustion of Benzene

Effect of Particle Size and Crystal Surface of CeO2 on the Catalytic Combustion of Benzene

Y-Modified MCM-22 Supported PdOx Nanocrystal Catalysts for Catalytic Oxidation of Toluene

Dual functional oyster shell-derived Ag/ZnO/CaCO3 nanocomposites with enhanced catalytic and antibacterial activities for water purification

Contact Info

Product

Resources

About

Dual functional oyster shell-derived Ag/ZnO/CaCO₃ nanocomposites with enhanced catalytic and antibacterial activities for water purification